@media screen and (max-width: 450px) {
    .wrap{
        width: 100%;
    }
}
@media screen and (min-width: 451px) and (max-width: 800px) {
    .wrap{
        width: 450px;
        margin:0 auto;

    }
}
@media screen and (min-width: 800px) {
    .wrap{
        width: 560px;
        /*max-width: 1000px;*/
        margin:0 auto;

    }
}